Adjustable tobacco pipe reamer



Oct. 18, 1949. 1.J. EDMoNDsoN 2,485,438

ADJUSTABLE TOBACCO PIPE BEAMER Filed Dec. 11, 1947 Patented Oct. 18, 1949 UNITED STATES PATENT oFFicE ADJUSTABLE TOBACCO PIPE BEAMER James J. Edmondson, Toronto, Ontario, Canada Application December 11, 1947, Serial No. 791,130

1 claim. l

My invention appertains to reamers for tobacco pipes in which the scraper blades are mounted on a holder for relative movement by which the reamer can be adjusted to suit diierent sized pipe-bowls.

It is a general object of the invention to provide a sturdy and compact reamer of the type referred to characterized in that a pair of coacting scraper blades are employed and carried by a telescopic holder formed of an inner member slidable on an outer member and controlled by a screw device for adjusting-the scraper blades.

More specically it is an object of the invention to provide a holder -for the blades comprising an inner plate-like member and an outer chambered member which slidably receives the inner member and is provided with a boss threadedly engaged with a screw shouldered on said inner member and supplied with an external head or knob to be turned by hand.

Another object of the invention is to provide an adjustable reamer in which an extensible holder is formed of a plastic material and with integrated scraper blades encased in metal shells on which scraper teeth are supplied. A distinctive feature of the construction is that one of the metal shells has a struck-up finger engaged in a slot in the holder to limit outward movement of the scraper blades.

The invention will be clearly understood from the ensuing specication and drawing.

In the drawing Fig. 1 is a side view of the reamer showing the Scrapers in open position.

Fig. 2 is a similar view but showing the scrapers closed.

Fig. 3 is a longitudinal sectional elevation of the device with 'the scrapers in open position as shown in Fig. l.

Fig. 4 is a cross section of the device taken on line 4-4 of Fig. 3.

Fig. 5 is a perspective view of the inner member.

Fig. 6 is a perspective view of the metal shell which forms a part of the scraper of the inner member.

Fig. 7 is a perspective view ofthe outer member of the device.

In the selected embodiment of the invention disclosed in the drawing the device comprises a blade holder formed of an inner member 8 and an outer member 49. Said members are telescopically interi'ltted and each carries a depending scraper blade I8. The blades are insertible in the bowl of a tobacco pipe for scraping the wall surface there.

icl- 246) of and for this purpose are supplied with suitable teeth.

The members 8 and 9 are of a general rectangular outline, and in the preferred construction of the device these members are mouldably formed of a plastic material and each is provided with an integral scraper body adapted to be encased in a metal shell to form a blade. Said inner member 8 is a plate-like element enlarged at its bottom portion through its length as at II. The enlargement I I extends horizontally and the scraper blade body, indicated at I2, depends vertically from the bottom face thereof, as clearly illustrated in Fig. 3.

Said outer member 9 is a hollow element formed by the side Walls I3, the top Wall I4 and the back wall I5. This provides a chamber I6 in which the inner member 8 is slidably fitted. The outer member is enlarged at its bottom portion, as at I3', to accomodate the enlargement II of the inner member 8. The scraper blade body, indicated at I'I, integrally depends from the side walls I3.

By sliding the inner member 8 inwardly and outwardly of the outer member 9 the scraperblade bodies are moved to and away from each other to adjust the scraper blades to different sized bowls of tobacco pipes. The scraper-blade bodies are desirably square in cross section. The plastic body I2 of the inner member 8 is encased in a metal shell I8 to form a serviceable blade for scraping operations. The plastic scraper blade body I1 of the outer member 9 is encased in a metal shell I9 for a similar purpose. The shells I8 and I9 are desirably pressed metal elements conforming in shape to the elements I2 and II, and are made a light press lit thereon. may be indented as at 20 after assembly by means of a centre punch to positively lock them in place. Other means may, of course, be resorted to for securing the shells on the elements I2 and I1 Without departing from the scope of the invention. In forming the shells of metal stampings the rear Walls thereof may be split longitudinally, as indicated at 2|, to facilitate manufacture. Teeth 22 are struck up on the outer edges of the shells in desired formation.

Means are provided to constrain the scraper blades to a limited opening movement. Said means comprises lingers 23 upwardly projecting from the side walls of the scraper shell l 8 for engaging stop shoulders 24 on the outer member 9 formed by slots 25 in the side walls I 3.

A screw device is employed to slide the inner member 8 on the outer member 9 in order to ad- They 3 just the scraper blades. Said screw device comprises an elongated boss 26 carried by the rear wall I5 of the outer member 9 to extend forwardly and freely within a recess 21 formed in the enlargement Il of the inner member 8. The boss 26 is provided with a threaded hole 28 engaged by a screw 29 shouldered in the inner member and protruding from the outer end face thereof where it is supplied with a knurled head 30 by which it? may?. ber convenientlyi turned; by"hand.

To reamfthe bowl of^a pipei-for Vremovalcflany adhering deposit it is only necessary to adjust the scraper blades to t the bowl and then to engage the blades in the bowl and turni-themas; required by means of the holder element. The device can be made with a range of `'adjustments-sotlsxatsit can be used for pipe bowlsof .various sizes. `It provides a sturdy scraper'tool which'is inexpensive to manufacture, and one in whichitlae-telescopic holder and the.v blade-bodies can be fash Edoned .of ea;,p'lastic t material l. in .anaattractivel and compact design.

KfW-hat, is y,claimed is:

fArea-mer-,fora tobacco pipe comprisinglanin- .ward its front. endfsaid .outer member lhaving lside -`wallspa top-f-wallgand `a:back walL-.which walls form a chamber in which said inner member is endwise slidable, said side walls being shaped to accommodate said enlargement of said inner member, a scraper blade rigidly depending from said inner member, a scraper blade rigidly depending from said outer member for co-acting with said scraper blade, and means for controlling the sliding movement of said inner member whereby to adjust the proximity of said scraper bladesfsaidmeans consisting ;f 2.a :boss extending from said back wall ofthe outer member and into said recessed enlargement of the inner member,

sand a headed screw threadedly engaged in said .boss and .shouldered in said recessed enlargement, said screw projecting through the front end of theiinnertmembenwith its head disposed externally thereof.

`xJAMES J. EDMONDSON.

REFERENCES CITED )The followingfreferencesaare offrecord .finrthe ile-L of f 4this @pater-it:

' UNITED'STA'IES k*PATENTS Number Name lDate L134223,803 ..Illig. -,July 25,1922 `1,669,525 .KisSel May 15'1928 FOREIGN :PATENTS Number Country Date 14,626 Great Britain 11909 4A35'7g851 Great Britain Oct. 1,',1931 

